Zerg Swarm Host

Burrow. (Pay {3} and sacrifice a land give creature with Burrow either First Strike or Unblockable, or prevent all damage that would done to this creature).
{t}{2}{b/r} Put a 1/1 Zerg Locust creature token onto the battlefield with Haste.
The swarm is always on the move, if they're not moving it's an ambush